package com.itheima.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggie.common.CustomerException;
import com.itheima.reggie.mapper.CategoryMapper;
import com.itheima.reggie.pojo.Category;
import com.itheima.reggie.pojo.Dish;
import com.itheima.reggie.pojo.Setmeal;
import com.itheima.reggie.service.CategoryService;
import com.itheima.reggie.service.DishService;
import com.itheima.reggie.service.SetmealService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

@Service
public class CategoryServiceImpl extends ServiceImpl<CategoryMapper, Category> implements CategoryService {

    @Autowired
    private DishService dishService;

    @Autowired
    private SetmealService setmealService;

    /**
     * 根据id删除分类
     * @param id
     */
    @Override
    public void deleteById(Long id) {
        //查询Dish表有没有菜品Id
        QueryWrapper<Dish> dw1 = new QueryWrapper<>();
        dw1.eq("category_id",id);
        int count1 = dishService.count(dw1);
        if (count1>0){
            throw new CustomerException("关联菜品表,无法删除");
        }
        //查询Setmeal表有没有菜品Id
        QueryWrapper<Setmeal> qw2 = new QueryWrapper<>();
        qw2.eq("category_id",id);
        int count2 = setmealService.count(qw2);
        if (count2>0){
            throw new CustomerException("关联套餐表,无法删除");
        }
        //删除菜品分类
        removeById(id);
    }
}
